Yesterday I went to test drive a MB E350, since I've read that they are comparable, and share some components. Some of the things I liked are the seats and the drive direction selector on the steering column. I did not like the downshifting of gears during accelaration (which is of course a problem with any non-EV). But the absolute deal-breaker for me was that the top of the windshield, sun visor and rear view mirror were right in my face, no more than 3 inches away. This made me feel very unsafe and cramped, and requires turning turning my head to see anything in the mirror. In the Volt and Prius there is a good 12 to 20 inches from my face to the visor and mirror.
Did anyone who sat in the Model S pay attention to this aspect of the interior? It's hard to judge from the design studio's interior side view pictures since the camera position is so close to the car. But it looks to me as there may be a potential problem.